From b9853be186eb62cbe76341175e7ba62f3f05625c Mon Sep 17 00:00:00 2001
From: Chevdor <chevdor@users.noreply.github.com>
Date: Tue, 31 Mar 2020 15:53:16 +0200
Subject: [PATCH] Listen by default to the local interface and allows changing
 it (#246)

---
 README.md           | 13 +++++++++++++
 backend/src/main.rs |  5 ++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 018e701..9d87bdd 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,19 @@ cd backend
 cargo build --release
 ./target/release/telemetry
 ```
+
+By default, telemetry will listen on the local interface only (127.0.0.1) on port 8000. You may change both those values:
+
+Use another port:
+```
+PORT=8123 telemetry
+```
+
+You may also change the the listening interface. This is especially required if you are using docker:
+```
+BIND=0.0.0.0 telemetry
+```
+
 ### Terminal 2 - Frontend
 ```
 yarn start:frontend
diff --git a/backend/src/main.rs b/backend/src/main.rs
index e35b411..66ba649 100644
--- a/backend/src/main.rs
+++ b/backend/src/main.rs
@@ -90,6 +90,8 @@ fn health(
         })
 }
 
+/// Telemetry entry point. Listening by default on 127.0.0.1:8000.
+/// This can be changed using the `PORT` and `BIND` ENV variables.
 fn main() -> std::io::Result<()> {
     use web::{resource, get};
 
@@ -101,6 +103,7 @@ fn main() -> std::io::Result<()> {
     let locator = SyncArbiter::start(4, move || factory.create());
 
     let port = std::env::var("PORT").ok().and_then(|v| v.parse().ok()).unwrap_or(8000u16);
+    let bind_address = std::env::var("BIND").ok().unwrap_or("127.0.0.1".to_string());
 
     HttpServer::new(move || {
         App::new()
@@ -115,7 +118,7 @@ fn main() -> std::io::Result<()> {
             .service(resource("/health").route(get().to_async(health)))
             .service(resource("/health/").route(get().to_async(health)))
     })
-    .bind(format!("0.0.0.0:{}", port))?
+    .bind(format!("{}:{}", bind_address, port))?
     .start();
 
     sys.run()